Institute Newton C. Braga

Circuit Bench

Polarity Indicator (CB219E)
This circuit uses the 741 Operational Amplifier to drive two LEDs. The LEDs indicate the signal of...
MW Experimental Radio (CB4517E)
This circuit was obtained from a 1964 magazine and has some interesting features such as the input...
High Impedance 2 W Amplifier (CB6163E)
This circuit was found in a 1968 General Electric documentation. It has an input impedance of 2 M ohms...